<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <input type="checkbox" id="cb1">
  <label for="cb1">男</label>
  <hr>
  <input type="checkbox" id="cb2">
  <label for="cb2">女</label>
</body>

</html>